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Finding the Fourth Proportional to 1,298,612.80, 1,946,594.40 and 877,931.20

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Solution

The fourth proportional to 1,298,612.80, 1,946,594.40 and 877,931.20 is: 1,316,001.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,298,612.80 : 1,946,594.40 = 877,931.20 : x
  2. Step 2: Convert to fraction form
    1,298,612.80/1,946,594.40 = 877,931.20/x
  3. Step 3: Cross multiply
    1,298,612.80x = 1,946,594.40 × 877,931.20
  4. Step 4: Simplify right side
    1,298,612.80x = 1,708,975,957,505.28
  5. Step 5: Solve for x
    x = 1,708,975,957,505.28/1,298,612.80
  6. Step 6: Final answer
    x = 1,316,001.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.