Home / 921,123.18-1,271,130.84-513,223.38

Finding the Fourth Proportional to 921,123.18, 1,271,130.84 and 513,223.38

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Solution

The fourth proportional to 921,123.18, 1,271,130.84 and 513,223.38 is: 708,237.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,123.18 : 1,271,130.84 = 513,223.38 : x
  2. Step 2: Convert to fraction form
    921,123.18/1,271,130.84 = 513,223.38/x
  3. Step 3: Cross multiply
    921,123.18x = 1,271,130.84 × 513,223.38
  4. Step 4: Simplify right side
    921,123.18x = 652,374,066,127.04
  5. Step 5: Solve for x
    x = 652,374,066,127.04/921,123.18
  6. Step 6: Final answer
    x = 708,237.60

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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.