Home / 879,639.40-1,319,286.30-288,663.40

Finding the Fourth Proportional to 879,639.40, 1,319,286.30 and 288,663.40

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Solution

The fourth proportional to 879,639.40, 1,319,286.30 and 288,663.40 is: 432,938.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,639.40 : 1,319,286.30 = 288,663.40 : x
  2. Step 2: Convert to fraction form
    879,639.40/1,319,286.30 = 288,663.40/x
  3. Step 3: Cross multiply
    879,639.40x = 1,319,286.30 × 288,663.40
  4. Step 4: Simplify right side
    879,639.40x = 380,829,668,931.42
  5. Step 5: Solve for x
    x = 380,829,668,931.42/879,639.40
  6. Step 6: Final answer
    x = 432,938.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.