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Finding the Fourth Proportional to 712,547.60, 983,278.19 and 390,250.83

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Solution

The fourth proportional to 712,547.60, 983,278.19 and 390,250.83 is: 538,525.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,547.60 : 983,278.19 = 390,250.83 : x
  2. Step 2: Convert to fraction form
    712,547.60/983,278.19 = 390,250.83/x
  3. Step 3: Cross multiply
    712,547.60x = 983,278.19 × 390,250.83
  4. Step 4: Simplify right side
    712,547.60x = 383,725,130,744.03
  5. Step 5: Solve for x
    x = 383,725,130,744.03/712,547.60
  6. Step 6: Final answer
    x = 538,525.61

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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.