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Finding the Fourth Proportional to 615,645.10, 922,430.85 and 578,320.30

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Solution

The fourth proportional to 615,645.10, 922,430.85 and 578,320.30 is: 866,506.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,645.10 : 922,430.85 = 578,320.30 : x
  2. Step 2: Convert to fraction form
    615,645.10/922,430.85 = 578,320.30/x
  3. Step 3: Cross multiply
    615,645.10x = 922,430.85 × 578,320.30
  4. Step 4: Simplify right side
    615,645.10x = 533,460,485,901.26
  5. Step 5: Solve for x
    x = 533,460,485,901.26/615,645.10
  6. Step 6: Final answer
    x = 866,506.51

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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.