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Finding the Fourth Proportional to 712,570.68, 983,312.46 and 390,282.21

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Solution

The fourth proportional to 712,570.68, 983,312.46 and 390,282.21 is: 538,570.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,570.68 : 983,312.46 = 390,282.21 : x
  2. Step 2: Convert to fraction form
    712,570.68/983,312.46 = 390,282.21/x
  3. Step 3: Cross multiply
    712,570.68x = 983,312.46 × 390,282.21
  4. Step 4: Simplify right side
    712,570.68x = 383,769,360,009.34
  5. Step 5: Solve for x
    x = 383,769,360,009.34/712,570.68
  6. Step 6: Final answer
    x = 538,570.24

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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.