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Finding the Fourth Proportional to 666,886,500.04, 920,316,685.64 and 388,445,959.68

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Solution

The fourth proportional to 666,886,500.04, 920,316,685.64 and 388,445,959.68 is: 536,063,180.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,886,500.04 : 920,316,685.64 = 388,445,959.68 : x
  2. Step 2: Convert to fraction form
    666,886,500.04/920,316,685.64 = 388,445,959.68/x
  3. Step 3: Cross multiply
    666,886,500.04x = 920,316,685.64 × 388,445,959.68
  4. Step 4: Simplify right side
    666,886,500.04x = 357,493,298,162,946,688
  5. Step 5: Solve for x
    x = 357,493,298,162,946,688/666,886,500.04
  6. Step 6: Final answer
    x = 536,063,180.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.