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Finding the Fourth Proportional to 712,726.32, 983,562.72 and 390,448.08

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Solution

The fourth proportional to 712,726.32, 983,562.72 and 390,448.08 is: 538,818.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,726.32 : 983,562.72 = 390,448.08 : x
  2. Step 2: Convert to fraction form
    712,726.32/983,562.72 = 390,448.08/x
  3. Step 3: Cross multiply
    712,726.32x = 983,562.72 × 390,448.08
  4. Step 4: Simplify right side
    712,726.32x = 384,030,175,583.58
  5. Step 5: Solve for x
    x = 384,030,175,583.58/712,726.32
  6. Step 6: Final answer
    x = 538,818.57

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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.