Home / 921,139-1,271,265.29-513,307.24

Finding the Fourth Proportional to 921,139, 1,271,265.29 and 513,307.24

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Solution

The fourth proportional to 921,139, 1,271,265.29 and 513,307.24 is: 708,416.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,139 : 1,271,265.29 = 513,307.24 : x
  2. Step 2: Convert to fraction form
    921,139/1,271,265.29 = 513,307.24/x
  3. Step 3: Cross multiply
    921,139x = 1,271,265.29 × 513,307.24
  4. Step 4: Simplify right side
    921,139x = 652,549,677,317.70
  5. Step 5: Solve for x
    x = 652,549,677,317.70/921,139
  6. Step 6: Final answer
    x = 708,416.08

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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.