Finding the Fourth Proportional to 1,249,862,455.36, 1,873,481,306.88 and 420,528,195.28
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Solution
The fourth proportional to 1,249,862,455.36, 1,873,481,306.88 and 420,528,195.28 is: 630,350,731.39
Step by Step Solution
- Step 1: Write the proportion equation
1,249,862,455.36 : 1,873,481,306.88 = 420,528,195.28 : x - Step 2: Convert to fraction form
1,249,862,455.36/1,873,481,306.88 = 420,528,195.28/x - Step 3: Cross multiply
1,249,862,455.36x = 1,873,481,306.88 × 420,528,195.28 - Step 4: Simplify right side
1,249,862,455.36x = 787,851,712,873,062,272 - Step 5: Solve for x
x = 787,851,712,873,062,272/1,249,862,455.36 - Step 6: Final answer
x = 630,350,731.39
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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.