Home / 985,405.10-1,478,151.40-386,312.90

Finding the Fourth Proportional to 985,405.10, 1,478,151.40 and 386,312.90

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Solution

The fourth proportional to 985,405.10, 1,478,151.40 and 386,312.90 is: 579,486.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    985,405.10 : 1,478,151.40 = 386,312.90 : x
  2. Step 2: Convert to fraction form
    985,405.10/1,478,151.40 = 386,312.90/x
  3. Step 3: Cross multiply
    985,405.10x = 1,478,151.40 × 386,312.90
  4. Step 4: Simplify right side
    985,405.10x = 571,028,953,973.06
  5. Step 5: Solve for x
    x = 571,028,953,973.06/985,405.10
  6. Step 6: Final answer
    x = 579,486.50

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1.5x scale

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.