Home / 712,734.16-983,574.32-390,437.20

Finding the Fourth Proportional to 712,734.16, 983,574.32 and 390,437.20

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Solution

The fourth proportional to 712,734.16, 983,574.32 and 390,437.20 is: 538,803.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,734.16 : 983,574.32 = 390,437.20 : x
  2. Step 2: Convert to fraction form
    712,734.16/983,574.32 = 390,437.20/x
  3. Step 3: Cross multiply
    712,734.16x = 983,574.32 × 390,437.20
  4. Step 4: Simplify right side
    712,734.16x = 384,024,003,492.70
  5. Step 5: Solve for x
    x = 384,024,003,492.70/712,734.16
  6. Step 6: Final answer
    x = 538,803.98

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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.